A new catalyst is being investigated for use in the production of a plastic chemical. Ten batches of the chemical are produced. The mean yield of the 10 batches is 72.5% and the standard deviation is 5.8%. Assume the yields are independent and approximately normally distributed. Find a 99% confidence interval for the mean yield when the new catalyst is used.
What will be an ideal response?
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The use of fluxes eliminates the need for good joint cleaning.
Answer the following statement true (T) or false (F)
Use the following information for questions 4 through 10.A leveling rod is used to check the finished height of a foundation wall at each of its four corners. The readings taken at the top of each corner are:Corner #1 - reading 19' - 1/8"Corner #2 - reading 18' - 11 7/8"Corner #3 - reading 19' - 1/4"Corner #4 - reading 19' - 3/16"Which of the four corners is the highest?
What will be an ideal response?
Lag screws are designed to attach metal to metal.
Answer the following statement true (T) or false (F)
The two most important characteristics to consider when purchasing a hammer or other striking tool are ________
A) Price and manufacturer B) Weight and feel C) Design and look D) Metal used and handle